Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 250/40-18 | 260/30-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.87 (657.2) | 24.14 (613.2) | -1.73 (-44) -6.7% |
| Width inches (mm) | 9.84 (250) | 10.24 (260) | 0.39 (10) 4% |
| Circum. inches (mm) | 81.29 (2064.65) | 75.84 (1926.42) | -5.44 (-138.23) -6.7% |
| Sidewall Height inches (mm) | 3.94 (100) | 3.07 (78) | -0.87 (-22) -22% |
| Revolutions per mile (km) | 779.47 (484.34) | 835.4 (519.1) | 55.93 (34.75) 7.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.66 mph (30.03 km/h) |
| 25 mph (40.23 km/h) | 23.33 mph (37.54 km/h) |
| 30 mph (48.28 km/h) | 27.99 mph (45.05 km/h) |
| 35 mph (56.33 km/h) | 32.66 mph (52.56 km/h) |
| 40 mph (64.37 km/h) | 37.32 mph (60.06 km/h) |
| 45 mph (72.42 km/h) | 41.99 mph (67.57 km/h) |
| 50 mph (80.47 km/h) | 46.65 mph (75.08 km/h) |
| 55 mph (88.51 km/h) | 51.32 mph (82.59 km/h) |
| 60 mph (96.56 km/h) | 55.98 mph (90.1 km/h) |
| 65 mph (104.61 km/h) | 60.65 mph (97.6 km/h) |
| 70 mph (112.65 km/h) | 65.31 mph (105.11 km/h) |
| 75 mph (120.7 km/h) | 69.98 mph (112.62 km/h) |
| 80 mph (128.75 km/h) | 74.64 mph (120.13 km/h) |
| 85 mph (136.79 km/h) | 79.31 mph (127.64 km/h) |
| 90 mph (144.84 km/h) | 83.97 mph (135.14 km/h) |
| 95 mph (152.89 km/h) | 88.64 mph (142.65 km/h) |
| 100 mph (160.93 km/h) | 93.3 mph (150.16 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2126 | 2470 | 2660 | 2777 | 2904 | 2994 | 3094 | 3212 | 3374 | 3537 | 3718 | 3863 | 4125 | 4415 | 4641 | 4786 | 4867 | 5166 | 5582 | 6486 |
Better Fuel Economy Factory Ratios Increased Power
